Wow... I could have sworn this was a drawing, and was going to favorite it for technical accuracy. Then I did a double take when I saw it was actually a photo. I think it's a wonderful portrait, whatever you did to make it look like this came out wonderfully! Most things I see are just filters that end up looking fake or contrived, this one actually has the feeling of a graphite drawing on tinted paper. It's subtle, and doesn't scream Photoshop. I think you did well with the contrast, bringing the focus down to her face and eyes. You also didn't lose the edges of her ears which are pretty delicate. There is some detail loss on her left (our right) shoulder, and the fur looks somewhat flat in that area, but it does balance well with where her right side fades out completely. The tiny clump of grass or fur under her right shoulder is a bit distracting, but it's not enough to pull away from the overall look of the piece. The subtle, almost abstract hint of a background is a great finish and keeps her lighter portions from disappearing completely. All in all, very well done!